AP Chemistry-midterm review - Quia

. 15.8 M
c. 12.8 M
d. 99.4 M
e. 26.2 M
____ 72. When a solution is diluted, what is the relationship of the number of moles of solute in the more concentrated
initial volume of solution to the number of moles of solute in the less concentrated final volume of solution?
a. The ratio of the numbers is directly proportional to the two volumes.
b. The ratio of the numbers is inversely proportional to the two volumes.
c. The number of moles of solute in the more concentrated initial volume is always greater.
d. The number of moles of solute in the less concentrated final volume is always greater.
e. The number of moles of solute in both solutions is the same.
____ 73. Calculate the molarity of the resulting solution prepared by diluting 25.0 mL of 18.0% ammonium chloride,
NH4Cl, (density = 1.05 g/mL) to a final volume of 80.0 mL.
a. 0.292 M
b. 0.059 M
c. 1.10 M
d. 0.0536 M
e. 0.00105 M
____ 74. If 45.0 mL of 0.250 M PbCl4 solution reacts with 20.0 mL of (NH4)2SO4, what is the molarity of the
(NH4)2SO4?
PbCl4 + 2(NH4)2SO4 Pb(SO4)2 + 4NH4Cl
a. 0.502 M
b. 1.25 M
c. 2.25 M
d. 1.13 M
e. 0.563 M
____ 75. What volume of 0.130 M HCl solution will just react with 0.424 gram of Ba(OH)2?
2HCl + Ba(OH)2 BaCl2 + 2H2O
a. 38.1 mL
b. 32.6 mL
c. 24.1 mL
d. 18.6 mL
e. 96.7 mL
____ 76. What volume of 0.132 M KOH solution would react completely with 25.8 mL of 0.198 M HCl according to
the following equation?
HCl + KOH KCl + H2O
a. 86.4 mL
b. 25.7 mL
c. 38.7 mL
d. 17.2 mL
e. 3.86 mL